Fluid pressure veneer press



M. M. TEAGUE WWAAM Mmm Filed DSO. 19, 1935 FLUID PRESSURE VEEER PRESS.March 9, H337.`

Patented Mar. 9, V i937 UNITED STATES PATENT OFFICE FLUID PRESSUREVENEER PRESS Monroe M. Teague, Lenoir, N. C. Application December 19,1935, Serial 'No. 55,271 2 claims. (ci. 1414-281) 'I'his inventionrelates to a press for making wood veneer and a process for producingveneered articles by means of such press, the ultimate object being toso veneer wooden cor as to eliminate the loss due to defective adhesionof the veneer which results from the known methods ci producing veneeredstock.

It is well known that the production of veneered stock of curved, round,or irregular curvilinear outline by known methods has been extremelydifficult with many culls resulting from improper'adhesion of the veneercoat to the core due to lack' of uniform pressure throughout the entiresurface of the veneer. The usual methods a employed have been the use ofrubber pads and some clamping means, and the use of pressure boxes inwhich the stock to be veneeredl is packed L in sawdust, and thenapplying pressure to the sawdust. Defective veneering results becauseneither the rubber nor the sawdust can be evenly compressed in theirregularities of the core.

These defects are overcome in my apparatus. The apparatus consists of asuitable receptacle so constructed as to withstand great internalpressure, and in which are provided suitable racks or shelves to supportcollapsible containers, which containers are so constructed as toexhaust into the open air. Means are provided for' introducing into saidreceptacle a suitable iiuid 30 under pressure, preferably compressedair.

Heating means within the said receptacle is also provided to hasten thedrying of the glue used to cause the veneer to adhere to its core. Thisheating means is usually, steam coils, but electrical resistance may beemployed if desired.

The accompanying drawing illustrates the invention in which Figure 1 isa diagrammatical vertical central longitudinal section of my apparatus.

Figure 2 is an end view of my apparatus, the end closure being removed.This shows the layout of shelves for supporting the' compression sacksand the manner of arranging said sacks on said shelves.

Figures 3 and 4 are cross-sections of pieces of veneer stock of unusualcontour illustrating the efficiency of my press in causing completeadherence of the veneer coat to the core.

In the drawing 10 is a drum constructed of steel or other suitablematerial. It has a closed end II, and an openable end I2 which isadapted to be closed by means of a suitable cap I3 se- Y cured inair-tight contact with the tank body by means of suitable clamping lugsI4. The tank is mounted on suitable base pieces I5.

.irregular shapes of cores.

- Within the tank are arranged suitable shelves I6 secured to the tankwall by brackets I'I. 'I'hese shelves or racks I6 may be of either solidor foraminous material, and are adapted to support veneering sacks ortubes IB formed of a suitable flexible material, such as rubber,rubberized cloth, or other freely flexible rgoods impervious to thepassage therethrough of air or other compressible fluid. These veneeringsacks are' o'f suitable length to accommodate stock cores of the zconventional length. It is obvious that the dimensions of the tankshelves and sacks may be of such length as to `accommodate any desiredlength of material without departing from the essentials of myinvention.

These sacks I8 are fitted with air-tight closures I9, and ducts 20 whichare in operative conm nection with-relief pipe 2| which discharges intothe A valve controlled pipe 22 opens into the tank and is connected witha suitable compressor, on pressure tank, not shown,

Within the tank is a heating coil 23 connected at 24 with a suitablesource of heat, not shown.

In operating my invention the requisite amount of veneer is treated witha suitable adhesive and taped to the stock core inthe usual way. This isthen placed in one of the compresslble sacks I8 which is closedby'air-tight closure I9, and connected with the atmosphere by means ofduct 20 and relief pipe 2I. The end or gate I3 isthen secured inposition. After this uid under pressure is introduced into the tankrbymeans of inlet 22. The air in the sack I8 is expelled collapsing the.sack walls thereby producing an even pressure throughout the extent ofthe core stock.

-This results in a'thorough and uniform contact 'of the veneer with thecore throughout its entire extent.

. It will be seen therefore that useof my invention will ensure completeand satisfactory contact of the veneer with concave, convex, round orFurthermore if .heat be introduced into heating element 23, the processwill be rapid as well as ,eilicient 1 Having thus fully disclosed myinvention, what I claim as new is:

1. A veneer press comprising a tank and closure therefor, a .huid-tightcollapsible container for veneer stock adapted to be located within saidtank, relief means extending from said container through a wall of thetank to the open air, and means for introducing into said tank fluidunder pressure.

2. A veneer press comprising; a tank, ailuidtight closure therefor, a.conduit extending within said tank and' closed from the interior thereofbut open to the atmosphere through a wall of l the tank, a. plurality ofiluid-tight collapsible containers for veneer stock, means in the tankto support said containers, means to connect the interior of saidcontainers with said conduit. and means @or introducing into said tankiuid under pressure, whereby said fluid pressure may expel the air fromthe interior of said containers with collapse of the containersuponenclosed veneer 5 stock.

MONROE M. TEAGUE.

